CVE-2006-4018

Exp

Heap-based buffer overflow in the pefromupx function in libclamav/upx.c in Clam AntiVirus (ClamAV) 0.81 through 0.88.3 allows remote attackers to execute arbitrary code via a crafted UPX packed file containing sections with large rsize values.

Published: 2006-08-08 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-4018 is rated High Exploit Risk (73.9/100): CVSS High severity, with high exploitation likelihood (EPSS 18.00%, 97th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2006-4018

EDB-ID Source Kind Published Link
28348 exploit_db edb 2006-08-07 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2006-4018

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 44.63% 18.00% -26.63%
2 2025-12-28 40.91% 44.63% +3.72%
3 2025-12-27 — 40.91% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-4018

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2006-4018

OS Trackers for CVE-2006-4018

vendor priority summary link
debian high CVE-2006-4018 high priority: Debian including 1 source packages (clamav), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2006-4018
gentoo high CVE-2006-4018: 1 GLSA(s) (200608-13), 1 atom(s) (app-antivirus/clamav); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2006-4018
ubuntu medium CVE-2006-4018 medium priority: Ubuntu including 1 source packages (clamav), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): released 3, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2006-4018

NVD evaluator notes for CVE-2006-4018

Solution: This vulnerability is addressed in the following product release: Clam Anti-Virus, ClamAV, 0.88.4

Affected software / configurations for CVE-2006-4018

Vendor Product Version Raw CPE
clamav clamav 0.81 cpe:2.3:a:clamav:clamav:0.81:*:*:*:*:*:*:*
clamav clamav 0.81 cpe:2.3:a:clamav:clamav:0.81:rc1:*:*:*:*:*:*
clamav clamav 0.82 cpe:2.3:a:clamav:clamav:0.82:*:*:*:*:*:*:*
clamav clamav 0.83 cpe:2.3:a:clamav:clamav:0.83:*:*:*:*:*:*:*
clamav clamav 0.84 cpe:2.3:a:clamav:clamav:0.84:*:*:*:*:*:*:*
clamav clamav 0.84 cpe:2.3:a:clamav:clamav:0.84:rc1:*:*:*:*:*:*
clamav clamav 0.84 cpe:2.3:a:clamav:clamav:0.84:rc2:*:*:*:*:*:*
clamav clamav 0.85 cpe:2.3:a:clamav:clamav:0.85:*:*:*:*:*:*:*
clamav clamav 0.85.1 cpe:2.3:a:clamav:clamav:0.85.1:*:*:*:*:*:*:*
clamav clamav 0.86 cpe:2.3:a:clamav:clamav:0.86:*:*:*:*:*:*:*
clamav clamav 0.86 cpe:2.3:a:clamav:clamav:0.86:rc1:*:*:*:*:*:*
clamav clamav 0.86.1 cpe:2.3:a:clamav:clamav:0.86.1:*:*:*:*:*:*:*
clamav clamav 0.86.2 cpe:2.3:a:clamav:clamav:0.86.2:*:*:*:*:*:*:*
clamav clamav 0.87 cpe:2.3:a:clamav:clamav:0.87:*:*:*:*:*:*:*
clamav clamav 0.87.1 cpe:2.3:a:clamav:clamav:0.87.1:*:*:*:*:*:*:*
clamav clamav 0.88 cpe:2.3:a:clamav:clamav:0.88:*:*:*:*:*:*:*
clamav clamav 0.88.1 cpe:2.3:a:clamav:clamav:0.88.1:*:*:*:*:*:*:*
clamav clamav 0.88.2 cpe:2.3:a:clamav:clamav:0.88.2:*:*:*:*:*:*:*
clamav clamav 0.88.3 cpe:2.3:a:clamav:clamav:0.88.3:*:*:*:*:*:*:*

References for CVE-2006-4018

URL Tags
http://kolab.org/security/kolab-vendor-notice-10.txt
http://secunia.com/advisories/21368 Vendor Advisory
http://secunia.com/advisories/21374 Vendor Advisory
http://secunia.com/advisories/21433 Vendor Advisory
http://secunia.com/advisories/21443 Vendor Advisory
http://secunia.com/advisories/21457 Vendor Advisory
http://secunia.com/advisories/21497 Vendor Advisory
http://secunia.com/advisories/21562 Vendor Advisory
http://security.gentoo.org/glsa/glsa-200608-13.xml
http://securitytracker.com/id?1016645
http://www.clamav.net/security/0.88.4.html Exploit Patch Vendor Advisory
http://www.debian.org/security/2006/dsa-1153
http://www.mandriva.com/security/advisories?name=MDKSA-2006:138
http://www.novell.com/linux/security/advisories/2006_46_clamav.html
http://www.overflow.pl/adv/clamav_upx_heap.txt Exploit Patch Vendor Advisory
http://www.securityfocus.com/archive/1/442681/100/0/threaded
http://www.securityfocus.com/bid/19381
http://www.trustix.org/errata/2006/0046/
http://www.vupen.com/english/advisories/2006/3175 Vendor Advisory
http://www.vupen.com/english/advisories/2006/3275 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/28286
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